/**
 * This file is part of 1genia trampoline
 * Copyright (C) 2007 1genia (contact@1genia.com)
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; version 3 of the License. 
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details. 
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; see the file COPYING.TXT.  If not,
 * write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301, USA. 
 **/
package com.genia.toolbox.persistence.memory.manager;

import com.genia.toolbox.persistence.basis.manager.AbstractManager;
import com.genia.toolbox.persistence.criteria.field.Field;
import com.genia.toolbox.persistence.criteria.order.Order;
import com.genia.toolbox.persistence.manager.OrderManager;
import com.genia.toolbox.persistence.memory.criteria.field.AbstractMemoryField;
import com.genia.toolbox.persistence.memory.criteria.order.MemoryOrder;

/**
 * Memory implementation of the <code>OrderManager</code> that allows to
 * define orders on the results of criteria.
 */
public class MemoryOrderManager
    extends AbstractManager
    implements OrderManager
{

  /**
   * return an Order describing an ascending sorting on the field given as
   * parameter.
   * 
   * @param field
   *          the field that will be sorted
   * @return an Order describing the sorting.
   */
  public Order asc(final Field field)
  {
    return new MemoryOrder(MemoryOrder.Direction.ASC, ((AbstractMemoryField) field));
  }



  /**
   * return an Order describing an descending sorting on the field given as
   * parameter.
   * 
   * @param field
   *          the field that will be sorted
   * @return an Order describing the sorting.
   */
  public Order desc(final Field field)
  {
    return new MemoryOrder(MemoryOrder.Direction.DESC, ((AbstractMemoryField) field));
  }

}
